Thank you for input Needsdecaf. This 2011 550i was built in June, 2010 which is in your "trouble zone." Would appreciate info on problems with these early build 2011's.
Dealer told me that other than scheduled maintenance this car had a recall replacement of water pump and a leaking coolant hose clamp 4000 miles ago but claims no overheating problem (did not lose coolant, only slow leak).
This car went into service December, 2010 so new car warranty and "free" maintenance until December, 2014 and CPO until December, 2016. However, a good warranty is still problematical if trip is ruined because car has a problem in Glendive, MT (something that happened to me years ago with a Jaguar) so basic reliability is an issue with me when BMW dealers are not always close by in this vast country of ours. Thanks for advice, Dennis